A protection device and a battery pack are provided, the protection device includes multiple terminal electrodes including a first terminal electrode and a second terminal electrode; a fusible conductor, where a lower surface of the fusible conductor is disposed on the first and second terminal electrodes, and the fusible conductor is supported by the first and second terminal electrodes, and two ends of the fusible conductor are electrically connected to the first and second terminal electrodes, respectively; and a first heat generating element, where one end of the first heat generating element is coupled to another surface of the fusible conductor different to the lower surface, or one end of the first heat generating element is coupled to a surface of any one of the first and second terminal electrodes.

A device is provided for switching an electrical circuit for electrical power levels of from 500 watts to 10 megawatts, which has two or more pyrotechnic disconnecting devices, which are connected in series between a terminal point and a load in order to interrupt the electrical circuit. The device also has at least one closing mechanism, wherein the number of closing mechanisms is less than the number of pyrotechnic disconnecting devices and wherein each closing mechanism is arranged in a parallel connection with a single pyrotechnic disconnecting device in order to bridge the one pyrotechnic disconnecting device and thereby close an interrupted electrical circuit.

A fuse device for at least one battery cell includes (i) a fuse element for interrupting a current flow from the battery cell in a critical state of the battery cell, (ii) a heating unit, which is connected, in particular electrically and/or thermally and/or mechanically, to the fuse element, and is provided to assist a triggering of the fuse element, (iii) a control unit for activating the heating unit in the critical state, and (iv) at least one carrier element for receiving the fuse element and at least one heating element of the heating unit.

A protective element includes: an insulating substrate; first and second electrodes provided on the insulating substrate; a heating element formed on the insulating substrate; a heating-element extraction electrode electrically connected to the heating element; a fusible conductor mounted from the first electrode to the second electrode with the heating-element extraction electrode interposed between the first and second electrodes; and an insulating protective layer which covers the heating element and includes a thermally conductive filler.

A battery control apparatus for a battery according to the present invention excludes a faulty battery cell from the connection between battery cells and at the same time automatically connects a replacement battery cell to the battery cells when a fault occurs in some of the battery cells, thereby allowing the output voltage of the battery to be kept constant in spite of the faulty battery cell. Further, in a state where a plurality of battery modules are connected in parallel, the battery control apparatus disconnects a battery module including a faulty battery cell during the replacement of the faulty battery cell, thereby preventing the output voltage of the battery from being discontinuous. In addition, a switch used in the battery control apparatus for a battery is a fusible switch including two separate fixed electrodes and one movable electrode.

A protection device comprises a first substrate, a second substrate, a fusible element and a heating element. The first substrate comprises a first surface, and the second substrate comprises a second surface facing the first surface. The fusible element is disposed on the first surface of the first substrate, and the heating element is disposed on the second surface of the second substrate and is disposed above the fusible element. When over-voltage or over-temperature occurs, the heating element heats up to blow the fusible element and thereby providing over-voltage and over-temperature protection.

A protection device comprises a first planar substrate, a second planar substrate, a heating element, a fusible element and an absorbent element. The first substrate comprises a first surface, and the second substrate comprises a second surface facing the first surface. The heating element is disposed on the first surface, and the fusible element is disposed above the heating element. The absorbent element is disposed on the second surface and above the fusible element. When over-current or over-temperature occurs, the heating element heats up to melt and blow the fusible element and the absorbent element absorbs melted metal of the fusible element.

Provided are a fuse resistor and a method of manufacturing the same, more particularly, are a fuse resistor mounted at an electric circuit of an electronic product to prevent the electronic product from breaking down due to inrush current, increase of internal temperature, and continuous overcurrent, and a method of manufacturing the same. The fuse resistor is capable of simplifying an assembly process by coupling a thermal fuse and a lead wire in a modularized manner and by fixing a fusing lead wire to the lead wire in an integrated manner to form a lower molding unit, and a method of manufacturing the same. The fuse resistor has a simple structure and is capable of being miniaturized as an integrated structure of the thermal fuse and the lead wire is inserted, and a method of manufacturing the same.

A protective element includes: a fuse element cuttable by energization in a first direction; a slider made of an insulating material, including: a plate-shaped portion extending in the first direction; a shielding portion erected in a second direction on the plate-shaped portion, having a shielding-portion through hole penetrating the shielding portion; and a case made of an insulating material, including a housing portion which houses a slider and a portion of the fuse element. The housing portion includes: a shielding-portion housing space which houses the shielding portion such that the shielding portion is movable in the second direction; and a plate-shaped-portion moving space which houses the plate-shaped portion such that the plate-shaped portion is movable in the second direction Prior to the fuse element being cut, the slider and the fuse element are housed such that the fuse element is inserted into the shielding-portion through hole.

Systems and methods for redundant circuit disconnection in electric vehicles are disclosed. Systems can include a resistive metallic fuse connected within an electrical circuit for a battery or otherwise, an inductor comprising a coil of at least one turn of wire about a longitudinal axis, and an AC power source configured to provide an alternating current across the inductor. The resistive metallic fuse may be disposed within the inductor along the longitudinal axis, and the AC power source may be configured to cause the inductor to induce within the resistive metallic fuse eddy currents of sufficient magnitude to melt or vaporize at least a portion of the resistive metallic fuse disposed therein.